原位电化学合成铁基电极材料及其超级电容器性能

采用胶体纳米粒子为模型进行研究。假设活性阳离子均匀分布在导电碳与粘结剂中，电解液离子的渗入可以原位形成活性胶体团簇。通过原位电化学方法合成了不同组成的铁基超级电容器电极材料。在不同的阳离子电解液中，铁胶体离子电极的电容不同，其中在KOH、NaOH、LiOH电解液中分别为1 113、927、755 F·g^-1。通过胶体的介尺度结构构筑，实现离子到材料性能的跨尺度可控调节。通过对胶体模型的拓展，提供了原位组成调节到材料性能跨尺度调控的新方法。

In Situ Electrochemical Synthesis of Fe-Based Electrode for Supercapacitors

This work adopts the colloidal nanoparticles as a model for research due to the prominent specific surface area of colloidal nanoparticles. There was a hypothesis that cations uniformly distributed in the conductive carbon and binder. Electrolyte ion can interact with cations to form reactive colloidal clusters in situ. Herein, the electrochemical method was adapted to synthesize different iron based electrode materials by the changes of electrolyte. Febased electrodes exhibited specific capacitances of 1 113, 927 and 755 F·g^-1 in KOH, NaOH and LiOH aqueous electrolyte, respectively. A novel type of colloid systems with adjustable structure was built, achieving multiscale controllable regulation of colloid structure and material performance. By extending the colloid model, a novel method of in situ composition adjustment to cross-scale control of material properties was provided.